package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;

import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;


@Slf4j
@Service
public class UserServiceImpl implements UserService {
    //微信服务接口地址，从官方平台get 获取的那个
    @Autowired
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    //配置文件传入的值会放入配置类，所以只需要自动注入然后获取即可
    @Autowired
    private WeChatProperties weChatProperties;
    //userMapper
    @Autowired
    private UserMapper userMapper;
    //微信登录
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
    //判断openid是否为空，空的话抛出异常
        String openid=getOpenId(userLoginDTO.getCode());
        //查询当前用户是否为新用户，用openid到表里面查，如果是新自动完成注册
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user=userMapper.getByOpenid(openid);
        //如果是新用户，自动完成注册
        if(user==null){
            user=User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        return user;
    }
    private String getOpenId(String code) {
        //调取微信接口获取当前用户的openid
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");

        String json= HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject= JSONObject.parseObject(json);
        String openId=jsonObject.getString("openid");
        return openId;
    }
}
